Eight students are competing for a blue, red, and yellow ribbon for their agriculture project. how many different ways are there to present those ribbons if the order matters?

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?